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Diffstat (limited to 'nx-X11/extras/Mesa_6.4.2/progs/tests/stencilwrap.c')
-rw-r--r--nx-X11/extras/Mesa_6.4.2/progs/tests/stencilwrap.c281
1 files changed, 281 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa_6.4.2/progs/tests/stencilwrap.c b/nx-X11/extras/Mesa_6.4.2/progs/tests/stencilwrap.c
new file mode 100644
index 000000000..753375d0f
--- /dev/null
+++ b/nx-X11/extras/Mesa_6.4.2/progs/tests/stencilwrap.c
@@ -0,0 +1,281 @@
+/* Test GL_EXT_stencil_wrap extension.
+ * This is by no means complete, just a quick check.
+ *
+ * Brian Paul 30 October 2002
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+GLboolean wrapping;
+
+static void RunTest(void)
+{
+ const GLenum prim = GL_QUAD_STRIP;
+ GLubyte val;
+ int bits, max, i;
+ int expected;
+ GLboolean failed;
+
+ glGetIntegerv(GL_STENCIL_BITS, &bits);
+ max = (1 << bits) - 1;
+
+
+ glEnable(GL_STENCIL_TEST);
+ glStencilFunc(GL_ALWAYS, 0, ~0);
+
+ /* test GL_KEEP */
+ glClearStencil(max);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+ failed = GL_FALSE;
+ printf("Testing GL_KEEP...\n");
+ expected = max;
+ glBegin(prim);
+ glVertex2f(0, 0);
+ glVertex2f(10, 0);
+ glVertex2f(0, 10);
+ glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf("Failed GL_KEEP test(got %u, expected %u)\n", val, expected);
+ failed = GL_TRUE;
+ }
+ else
+ printf("OK!\n");
+
+ /* test GL_ZERO */
+ glClearStencil(max);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_ZERO);
+ failed = GL_FALSE;
+ printf("Testing GL_ZERO...\n");
+ expected = 0;
+ glBegin(prim);
+ glVertex2f(0, 0);
+ glVertex2f(10, 0);
+ glVertex2f(0, 10);
+ glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf("Failed GL_ZERO test(got %u, expected %u)\n", val, expected);
+ failed = GL_TRUE;
+ }
+ else
+ printf("OK!\n");
+
+ /* test GL_REPLACE */
+ glClearStencil(max);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+ failed = GL_FALSE;
+ printf("Testing GL_REPLACE...\n");
+ expected = 0;
+ glBegin(prim);
+ glVertex2f(0, 0);
+ glVertex2f(10, 0);
+ glVertex2f(0, 10);
+ glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf("Failed GL_REPLACE test(got %u, expected %u)\n", val, expected);
+ failed = GL_TRUE;
+ }
+ else
+ printf("OK!\n");
+
+ /* test GL_INCR (saturation) */
+ glClearStencil(0);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
+ failed = GL_FALSE;
+ printf("Testing GL_INCR...\n");
+ for (i = 1; i < max+10; i++) {
+ expected = (i > max) ? max : i;
+ glBegin(prim);
+ glVertex2f(0, 0); glVertex2f(10, 0);
+ glVertex2f(0, 10); glVertex2f(10, 10);
+ glEnd();
+
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf( "Failed GL_INCR test on iteration #%u "
+ "(got %u, expected %u)\n", i, val, expected );
+ failed = GL_TRUE;
+ }
+ }
+ if ( !failed )
+ printf("OK!\n");
+
+ /* test GL_DECR (saturation) */
+ glClearStencil(max);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
+ failed = GL_FALSE;
+ printf("Testing GL_DECR...\n");
+ for (i = max-1; i > -10; i--) {
+ expected = (i < 0) ? 0 : i;
+ glBegin(prim);
+ glVertex2f(0, 0); glVertex2f(10, 0);
+ glVertex2f(0, 10); glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf( "Failed GL_DECR test on iteration #%u "
+ "(got %u, expected %u)\n", max - i, val, expected );
+ failed = GL_TRUE;
+ }
+ }
+ if ( !failed )
+ printf("OK!\n");
+
+ /* test GL_INVERT */
+ glClearStencil(0);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_INVERT);
+ failed = GL_FALSE;
+ printf("Testing GL_INVERT...\n");
+ expected = max;
+ glBegin(prim);
+ glVertex2f(0, 0);
+ glVertex2f(10, 0);
+ glVertex2f(0, 10);
+ glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf("Failed GL_INVERT test(got %u, expected %u)\n", val, expected);
+ failed = GL_TRUE;
+ }
+ else
+ printf("OK!\n");
+
+ if(wrapping)
+ {
+ /* test GL_INCR_WRAP_EXT (wrap around) */
+ glClearStencil(0);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_INCR_WRAP_EXT);
+ failed = GL_FALSE;
+ printf("Testing GL_INCR_WRAP_EXT...\n");
+ for (i = 1; i < max+10; i++) {
+ expected = i % (max + 1);
+ glBegin(prim);
+ glVertex2f(0, 0); glVertex2f(10, 0);
+ glVertex2f(0, 10); glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf( "Failed GL_INCR_WRAP test on iteration #%u "
+ "(got %u, expected %u)\n", i, val, expected );
+ failed = GL_TRUE;
+ }
+ }
+ if ( !failed )
+ printf("OK!\n");
+
+ /* test GL_DECR_WRAP_EXT (wrap-around) */
+ glClearStencil(max);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_DECR_WRAP_EXT);
+ failed = GL_FALSE;
+ printf("Testing GL_DECR_WRAP_EXT...\n");
+ for (i = max-1; i > -10; i--) {
+ expected = (i < 0) ? max + i + 1: i;
+ glBegin(prim);
+ glVertex2f(0, 0); glVertex2f(10, 0);
+ glVertex2f(0, 10); glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf( "Failed GL_DECR_WRAP test on iteration #%u "
+ "(got %u, expected %u)\n", max - i, val, expected );
+ failed = GL_TRUE;
+ }
+ }
+ if ( !failed )
+ printf("OK!\n");
+ }
+
+ glDisable(GL_STENCIL_TEST);
+}
+
+
+static void Display( void )
+{
+ glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+ RunTest();
+
+ glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+ glViewport( 0, 0, width, height );
+ glMatrixMode( GL_PROJECTION );
+ glLoadIdentity();
+ glOrtho(0, width, 0, height, -1, 1);
+ glMatrixMode( GL_MODELVIEW );
+ glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+ (void) x;
+ (void) y;
+ switch (key) {
+ case 27:
+ exit(0);
+ break;
+ }
+ glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+ const char * ver_str;
+ float version;
+
+ printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+ printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+
+
+ /* Check for both the extension string and GL version 1.4 on the
+ * outside chance that some vendor exports version 1.4 but doesn't
+ * export the extension string. The stencil-wrap modes are a required
+ * part of GL 1.4.
+ */
+
+ ver_str = glGetString( GL_VERSION );
+ version = (ver_str == NULL) ? 1.0 : atof( ver_str );
+
+ wrapping = (glutExtensionSupported("GL_EXT_stencil_wrap") || (version >= 1.4));
+ if (!wrapping)
+ printf("GL_EXT_stencil_wrap not supported. Only testing the rest.\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+ glutInit( &argc, argv );
+ glutInitWindowPosition( 0, 0 );
+ glutInitWindowSize( 400, 400 );
+ glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_STENCIL );
+ glutCreateWindow(argv[0]);
+ glutReshapeFunc( Reshape );
+ glutKeyboardFunc( Key );
+ glutDisplayFunc( Display );
+ Init();
+ glutMainLoop();
+ return 0;
+}
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